12- 186 C.M.R. ch. 2, § 18
A party to a proceeding before the Panel may request the attendance of witnesses voluntarily or by subpoena. If witnesses or documents are sought by subpoena, the requesting party must first make a written request to the Panel or presiding official for the issuance of the subpoena. When the subpoena is issued, it is the responsibility of the requesting party to serve the subpoena or cause it to be served on the named individual. When a witness is subpoenaed, the witness fee and transportation allowance established by 16 M.R.S.A. §251 must be provided at the time the subpoena is served. The Panel may require by subpoena the attendance and testimony of witnesses, the production of books, records and other evidence relevant to issues raised by a rate determination petition or responses to the petition. If the Panel, on its own motion, requires the attendance of witnesses through subpoenas, the Panel will cause the subpoena to be served on the named individual and will be responsible for paying the required witness fee and transportation allowance.
12- 186 C.M.R. ch. 2, § 18